Power-transmission device



E. FUCHS. PozwEkR TRANSMISSION DEVICE.

VAPPLICATION FILED sEPT'.I2..I9I1.

1 ,357,769 Patented NW2, H1920.

lUNITED sTATEsj PATENT OFFICE.

ERNEST FUCHS, o'E BILLANcoURrrEANcE, Ass'IGNoE To Louis RENAULT; 0E

BILLANCOURT, FRANCE.

POWER-TRANSMISSION DEVICE.

.specification of Lettersratenf. Patenifly Nov. l2, 1920.

Appn'eation sied 'september 12, 1917. seriai No. 190,925.

' zen of the French Republic, have invented certain new and usefulImprovements in or` Relating to Power-Transmission Devices;

and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertai'ns to make and use the same.

The present invention has for 'its object a reducing device which servesto drive two parts turning in the same direction thereversal of thedriveV of the two parts taking place automaticallywith suppression ofthe reducer.

. The accompanying drawings show, by way of example, aconstructie-rialform of the device according to the invention applied to the driving ofmotor dynamos for ing device accordingto the invention.

automobile vehicles serving for lighting and starting: v

Figure 1 `is'a vertical section of a reduc- F ig. 2 is a Verticalsection on the line 1'-'1 of Fig. 1

In Fig. 1, .the lighting or starting dynamo.

is represented at 1. It is Connected by a clutch 2 to a shaft 3 formingpart vo-f the device, a toothed wheel 4 is mounted on-the shaft 3 andgears into a group of Wheelsv 5 and 6 fixed on a shaft 7 carried inbearings 8 and 9 forming part of a cylindrical casing l0 mounted looselyon the shaft 3. vThe shaft 3 is carried at its rear part in a hollow- 11in a hollow shaft 12 provided with a toothed wheel 12 gearing intothewheel 6 extending beyond the other end of the cas.

ing and to which is fixed a pinion 13 in relation with the motor.

The centrifugal mass clutch situated in theright hand part ofthe casing10 is composed of a plate 14 forming part of a sleeve` 15 fast on theshaft 12. The plate 14 has a` certain number of ribs lfwhich divide itup into compartments each' containing a mass 17 of spherical form whichbears against a'spring 18. surrounding the whole of the balls. Thisspring is also capable of bearingi when stretched against a cylindricalpa rt 19 of the casing 10 in such a way as to carry'it round in itsrotary movement.

.The outer part of the casing 10 has likewise a. lbrake band 20embracing all parts one of its ends 21 being worked by means ofanelectro-magnet 22, traversed by the curfrent of the dynamo 1, sothatif this dynamo the motor, the current is sent into the dynamo 1-workingasa starting motor, the electro-magnet 22 lsexcited Awhile rendering thecasing 10 immovableby reason-'of' the action 'of the brake 20. Thetransmission of motion to the pinion is effected by the shaft 3, thewheel 1,'the wheel 5, thewheel 6,A the wheel 12 Ywith the reductionpossessed by the train of gears'4=,`5, 6 and 12.

As soon as the motor is started the speed of the shaft 12 andconsequently of the plate 14 increases the pressure of the massesagainst the spring 18 which bearsl against stops all rotation of the theperiphery 19, the dynamo stops however working as a motorand theelectro-magnet 22 ceases to be excited which liberates the' casing 10.The casing, the centrifugal mass clutch, andthe gear wheels then formsame speed as the pinion 13, thatis to say,

Vwithout any demultiplication.

4a whole carrying around the shaft 4 at the 1." A driving mechanismadapted to be used in connection with motor generatorsfor internalcombustionengines, comprising a two-part shaft, a casing loosely mountedon one partof the shaft, a' centrifugal clutch mounted Ao n theotherpart of the shaft, in-

' on one part pf the shaft7 a Centrifugal clutch adapted to secure thecasing to the other part of the shaft, dierential gearing carried by thecasing and .by both parts of the shaft and an electromagneticallycontrolled brake for preventing the movement of the casing until theshaft exceeds a predetermined speed.

3. A driving mechanism adapted to be used in `connection with a motorgenerator i for vinternal combustion engines, comprising a tivo-pa rttelescoping shaft, a casing loosely mounted on one part of the l'shaftyabrake' band operated by an e'lectromagnet encircling said casing, acentrifugal clutch mounted .on the otlie-r part of said shaft, gearscarried by both parts of the shaft,

gears carriedgby the casing intermeslied Witli'said first mentionedgears, the'centrifugall clutch adapted to lock' both shafts together byits engagement withA the casing upon'the release of the brake when thedesired speed is reached'.`

,4. A driving mechanism .adapted Vtobe usedl in connection with a motorgenerator for internal combustion engines, comprising a two-parttelescoping shaft, means carried by the outside ends of said shaft forcon-- nection with either driving or driven mechanism, gearing. andclutch mechanism connecting`both of said shafts comprising a casingloosely mounted on'one part of theI shaft, braking means for locking thecasing againstrotation, .said casing having journaled thereindifferential gears, gearsicar! ried by bothparts of the shaftintermeshed.

with said iirstinentioned gears and a cenused lin connection with amotor generator for internal combustion engines, a tw0-part shaft,acasing loosely mounted on one part of the shaft,'1n termeshing gearingcarried by both parts of the shaft and-the casing, a v

brake .for the casing, and a centrifugal clutchpsecured to the otherpaitof the shaft comprising a housing for a series of balls,

spacing elements betiveen saidballs and a. split ring encircling theballs aga-inst which i the Isaine are forced by centrifugal action,causing saidring to frictionally engage the overlying 4portion ofthecasing and thereby lock the tivo parts of 'the shaft together,resulting a uniform rotation thereof upon release of the brake.. `Intestimony whereof I ailiX my signature in presence ofutivo Witnesses.

ERNEST FUCHS. [Ls] Witnesses:

JOSEPH GEMENIL, HIPPOLYTE oFFE.

